Liebert PSI is a compact, line-interactive UPS system designed especially for IT applications such as network closets and small data centers. It provides reliable power protection for servers, critical nodes, network workstations, large network peripherals, network routers, bridges, and other electronic equipment.
Features

• Line interactive design with sinewave output
• Up to 9 battery-backed sockets
• USB and network communications
• Advance early warning shutdown
• Ample battery backup time to grant orderly server shutdown
• Configurable input voltage window (220, 230, and 240V)
• Data-line surge protection
• Cold-start on Battery
• Remote UPS monitoring through SNMP/Web card
• Fully RoHS compliant

Benefits

• Liebert PSI is designed and packaged for flexibility and high availability 
• 0.9 output power factor for active power maximization
• Up to 4 minutes backup time at full load, more than enough to grant orderly OS shutdown
• User replaceable, hot-swap batteries for increased availability
• Versatile rack-tower design which adapts to all types of installations
• Rotatable LED display which adapts to both rack and tower mounting
• Mounting hardware and shutdown software included in UPS package for increased ease of use